diff options
Diffstat (limited to 'src/ppu.c')
| -rw-r--r-- | src/ppu.c | 17 |
1 files changed, 16 insertions, 1 deletions
@@ -257,9 +257,13 @@ void S9xSetCPU(uint8 byte, uint16 Address) { // Multiplicand uint32 res = Memory.FillRAM[0x4202] * byte; - +#if defined FAST_LSB_WORD_ACCESS || defined FAST_ALIGNED_LSB_WORD_ACCESS + /* assume malloc'd memory is 2-byte aligned */ + *((uint16 *)&Memory.FillRAM[0x4216]) = res; +#else Memory.FillRAM[0x4216] = (uint8) res; Memory.FillRAM[0x4217] = (uint8)(res >> 8); +#endif break; } case 0x4204 : @@ -269,15 +273,26 @@ void S9xSetCPU(uint8 byte, uint16 Address) case 0x4206 : { // Divisor +#if defined FAST_LSB_WORD_ACCESS || defined FAST_ALIGNED_LSB_WORD_ACCESS + /* assume malloc'd memory is 2-byte aligned */ + uint16 a = *((uint16 *)&Memory.FillRAM[0x4204]); +#else uint16 a = Memory.FillRAM[0x4204] + (Memory.FillRAM[0x4205] << 8); +#endif uint16 div = byte ? a / byte : 0xffff; uint16 rem = byte ? a % byte : a; +#if defined FAST_LSB_WORD_ACCESS || defined FAST_ALIGNED_LSB_WORD_ACCESS + /* assume malloc'd memory is 2-byte aligned */ + *((uint16 *)&Memory.FillRAM[0x4214]) = div; + *((uint16 *)&Memory.FillRAM[0x4216]) = rem; +#else Memory.FillRAM[0x4214] = (uint8) div; Memory.FillRAM[0x4215] = div >> 8; Memory.FillRAM[0x4216] = (uint8) rem; Memory.FillRAM[0x4217] = rem >> 8; +#endif break; } case 0x4207 : |